Thermally induced structural transitions and temperature memory effect in a luminescent vitrified film of an anisometric europium(III) β-diketonate complex

Dmitry V. Lapaev,Victor G. Nikiforov,Vladimir S. Lobkov,Andrey A. Knyazev,Yuriy G. Galyametdinov

Journal of Photochemistry and Photobiology A: Chemistry（2022）

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Abstract

•Vitrified Eu(DK12-14)3phen film (sandwiched between quartz plates) has been fabricated.•Performed weeklong monitoring revealed temperature memory effect.•Proposed model indicates thermally-induced transitions between two local states of film.•These two states are most likely close to crystalline and amorphous local structures.•Effect could be utilized in designing photonic materials equipped with memory function.

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Key words

Anisometric lanthanide(III) β-diketonate complexes,Photostable luminescent materials,Vitrified films,Ligand-to-metal energy transfer,Eu3+ ions emission,Film local structure

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